import Vue from 'vue'
import Router from 'vue-router'
import Login from './components/login.vue'
import Home from './components/Home.vue'


Vue.use(Router)

const router = new Router({
    routes:[
        {path:'/',redirect:'login'},
        { path: '/login',component: Login },
        { path: '/home',component: Home }
    ]
})

// 挂载路由导航守卫
router.beforeEach((to,from,next)=> {
    // to 将要访问的路径
    // from 代表从哪个路径跳转而来
    // next 是一个函数，表示放行
    //  next() 放行  next('/login') 强制跳转

    if(to.path === '/login') return next();
    // 获取token 
    const tokenSter = window.sessionStorage.getItem('token')
    if (!tokenSter) return next('/login')
    next()
})

export default router

